VID-1974 setting a border around all gallery images

Well, the conventions say "MediaWiki favors a heavily-spaced style for optimum readability" and use examples like this for arrays ```$myResult = MyClass::getSomething( $input, array( 'fromDB', 'publicOnly' ) );```.

They don't speak specifically to this alternate array syntax, but I would imagine the principles would be the same.

http://www.mediawiki.org/wiki/Manual:Coding_conventions/PHP#Spaces